Construction of emery-wheels and supports therefor



THEREFOR.

LSA

O. L. H

MERY WHBE (No Model.)

GONSTRUGTION OF B No. 489,149.

m'fnesses:

UNITED STATES PATENT OFFICE.

CLARENCE L. HYDE, OF CHICAGO, ILLINOIS.

CONSTRUCTION OF EMERY-WHEELS AND SUPPORTS THEREFOR.

SPECIFICATION formingpart of Letters Patent No. 489,149, dated January3, 1893.

Application filed February 29, 1892. Serial No. 423,295- (No model.)

To all whom it may concern:

Be it known that I, CLARENCE L. HYDE, a citizen of the United States,residing at Chicago, county of Cook, and State of Illinois, haveinvented new and useful Improvements in the Construction of Emery-Wheelsand Supports Therefor, of which the following is a specification,reference being had to the annexed drawingsfllldstrating the invention,in which-- Figure l is vertical central section of an emery wheelconstructed and supported in accordance with my invention. Fig. 2. anelevation of Fig. 1 on a scale of about one third the size thereof. Fig.3.2. modification of the devices for supporting the emery wheel.

This invention relates to the construction of an emery wheel so that,thethickness of the wheel shall be substantially the same in all thegrinding surface it presents, as it wears to a less diameter; and at thesame time the wheel shall possess such a serpentine form in radialsection that the means employed to prevent the wheel from bursting bycentrifugal force can be properly applied. To that end, M. B. representthose portions of the wheel which form a plane parallel to itself, Mbeing the hub portion and B that portion which extends beyond thecorrugated disks 11 whose internal contour coincides with the serpentineand flat portion of the sides of the wheel they cover. In forming thewheel of the size shown one side will have thereon two convex curves Cand D and one concave curve G. and the other side will have one convexcurve L and two concave curves G and G, and the curves of the supportsH, H. will be respectively inverse to the curves on the wheel; but forlarger wheels there may be additional serpentine curves formed in itsside portions and the supports may be extended.

A is the shaft of the wheel and I, I. are two collar plates which liebetween the nuts J, J. to insure material strength where the emery wheelis quite thick and is to be run at a high rate of speed, but in ordinarywheels, as speeded, the supports H, H. will serve well the purpose, ifmade much lighter than the drawings represent.

In practice the emery wheels maybe molded and the serpentine portionstrued on a lat-he when the composition of the wheel is yet soft enoughto be worked in that manner. Sometimes I form the wheels in dies toattain accuracy in contour. The supports H. H may be made of cast metalproperly trued up to fit; preferably, however, I form them of suitablemetal and by dies. Care must be taken to make the supporting disk fit,closely, the serpentine contour of the emery wheel; and the outer marginof the disk on both sides of the wheel comes first in contact with thelatter that the exterior portion of the wheel be so clamped between thesupports that they will sustain the centrifugal force exerted by thewheel. As the wheel becomes worn down, the supports H. II. I. I. can beremoved and replaced by supports of a less diameter, one of which isshown in section at K Fig. 3, which will extend only to between L. L.Fig. 1.

In practice the left hand nut J is often simply a collar shrunk on theshaft; but it is sometimes desirable to employ it as a jamb nut.

Having thus described my invention I claim and desire to secure byLetters Patent- An emery wheel having its sides formed with concaveportions C and convex portions G, the convexities on one side beingopposite the concavities on the other side, whereby the wheel is made ofsubstantially uniform thickness throughout, and disks having one oftheir sides provided with corresponding convex and concave portionsclamped to the sides of the wheel, as described and shown.

CLARENCE L. HYDE. Witnesses:

G. L. CHAPIN, ELLIS S. CHESBROUGH.

